src/src/buildconfig.c

   1 /* $Cambridge: exim/src/src/buildconfig.c,v 1.18 2010/06/07 18:09:07 pdp Exp $ */
   2
   3 /*************************************************
   4 *     Exim - an Internet mail transport agent    *
   5 *************************************************/
   6
   7 /* Copyright (c) University of Cambridge 1995 - 2009 */
   8 /* See the file NOTICE for conditions of use and distribution. */
   9
  10
  11 /*************************************************
  12 *       Build configuration header for Exim      *
  13 *************************************************/
  14
  15 /* This auxiliary program builds the file config.h by the following
  16 process:
  17
  18 First, it determines the size of off_t and time_t variables, and generates
  19 macro code to define OFF_T_FMT and TIME_T_FMT as suitable formats, if they are
  20 not already defined in the system-specific header file.
  21
  22 Then it reads Makefile, looking for certain OS-specific definitions which it
  23 uses to define some specific macros. Finally, it reads the defaults file
  24 config.h.defaults.
  25
  26 The defaults file contains normal C #define statements for various macros; if
  27 the name of a macro is found in the environment, the environment value replaces
  28 the default. If the default #define does not contain any value, then that macro
  29 is not copied to the created file unless there is some value in the
  30 environment.
  31
  32 This program is compiled and run as part of the Make process and is not
  33 normally called independently. */
  34
  35
  36 #include <ctype.h>
  37 #include <inttypes.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <sys/types.h>
  42 #include <pwd.h>
  43 #include <grp.h>
  44
  45 typedef struct {
  46   char *name;
  47   int *flag;
  48 } have_item;
  49
  50 typedef struct {
  51   char *name;
  52   char *data;
  53 } save_item;
  54
  55 static char *db_opts[] = { "", "USE_DB", "USE_GDBM", "USE_TDB" };
  56
  57 static int have_ipv6 = 0;
  58 static int have_iconv = 0;
  59
  60 static char errno_quota[256];
  61 static char ostype[256];
  62 static char cc[256];
  63
  64 /* If any entry is an initial substring of another, the longer one must
  65 appear first. */
  66
  67 static have_item have_list[] = {
  68   { "HAVE_IPV6",      &have_ipv6 },
  69   { "HAVE_ICONV",     &have_iconv },
  70   { NULL, NULL}
  71 };
  72
  73 static save_item save_list[] = {
  74   { "ERRNO_QUOTA",    errno_quota },
  75   { "OSTYPE",         ostype },
  76   { "CC",             cc },
  77   { NULL, NULL}
  78 };
  79
  80
  81 /* Subroutine to check a string for precisely one instance of "%s". If not,
  82 bomb out. */
  83
  84 void
  85 check_percent_ess(char *value, char *name)
  86 {
  87 int OK = 0;
  88 char *p = strstr(value, "%s");
  89 if (p != NULL) OK = strstr(p+2, "%s") == NULL;
  90 if (!OK)
  91   {
  92   printf("\n*** \"%s\" (%s) must contain precisely one occurrence of\n"
  93     "*** \"%%s\". Please review your build-time configuration.\n\n/", value,
  94     name);
  95   exit(1);
  96   }
  97 }
  98
  99
 100 /* Main program */
 101
 102 int
 103 main(int argc, char **argv)
 104 {
 105 off_t test_off_t = 0;
 106 time_t test_time_t = 0;
 107 #if !(__STDC_VERSION__ >= 199901L) && !defined(PRIdMAX)
 108 size_t test_size_t = 0;
 109 unsigned long test_ulong_t = 0L;
 110 #endif
 111 long test_long_t = 0;
 112 FILE *base;
 113 FILE *new;
 114 int last_initial = 'A';
 115 int linecount = 0;
 116 int have_auth = 0;
 117 int in_local_makefile = 0;
 118 int use_which_db = 0;
 119 int use_which_db_in_local_makefile = 0;
 120 int support_crypteq = 0;
 121 char buffer[1024];
 122
 123 if (argc != 1)
 124   {
 125   printf("*** Buildconfig: called with incorrect arguments\n");
 126   exit(1);
 127   }
 128
 129 new = fopen("config.h", "wb");
 130 if (new == NULL)
 131   {
 132   printf("*** Buildconfig: failed to open config.h for output\n");
 133   exit(1);
 134   }
 135
 136 printf("Building configuration file config.h\n");
 137
 138 fprintf(new, "/*************************************************\n");
 139 fprintf(new, "*           Configuration header for Exim        *\n");
 140 fprintf(new, "*************************************************/\n\n");
 141
 142 fprintf(new, "/* This file was automatically generated from Makefile and "
 143   "config.h.defaults,\n");
 144 fprintf(new, "using values specified in the configuration file Local/Makefile.\n");
 145 fprintf(new, "Do not edit it. Instead, edit Local/Makefile and "
 146   "rerun make. */\n\n");
 147
 148 /* First, deal with the printing format for off_t variables. We assume that if
 149 the size of off_t is greater than 4, "%lld" will be available as a format for
 150 printing long long variables, and there will be support for the long long type.
 151 This assumption is known to be OK for the common operating systems. */
 152
 153 fprintf(new, "#ifndef OFF_T_FMT\n");
 154 if (sizeof(test_off_t) > sizeof(test_long_t))
 155   {
 156   fprintf(new, "#define OFF_T_FMT  \"%%lld\"\n");
 157   fprintf(new, "#define LONGLONG_T long long int\n");
 158   }
 159 else
 160   {
 161   fprintf(new, "#define OFF_T_FMT  \"%%ld\"\n");
 162   fprintf(new, "#define LONGLONG_T long int\n");
 163   }
 164 fprintf(new, "#endif\n\n");
 165
 166 /* Now do the same thing for time_t variables. If the length is greater than
 167 4, we want to assume long long support (even if off_t was less than 4). If the
 168 length is 4 or less, we can leave LONGLONG_T to whatever was defined above for
 169 off_t. */
 170
 171 fprintf(new, "#ifndef TIME_T_FMT\n");
 172 if (sizeof(test_time_t) > sizeof(test_long_t))
 173   {
 174   fprintf(new, "#define TIME_T_FMT  \"%%lld\"\n");
 175   fprintf(new, "#undef  LONGLONG_T\n");
 176   fprintf(new, "#define LONGLONG_T long long int\n");
 177   }
 178 else
 179   {
 180   fprintf(new, "#define TIME_T_FMT  \"%%ld\"\n");
 181   }
 182 fprintf(new, "#endif\n\n");
 183
 184 /* And for sizeof() results, size_t, which should with C99 be just %zu, deal
 185 with C99 not being ubiquitous yet.  Unfortunately. */
 186
 187 #if __STDC_VERSION__ >= 199901L
 188 fprintf(new, "#define SIZE_T_FMT  \"%%zu\"\n");
 189 #else
 190 # ifdef PRIdMAX
 191 fprintf(new, "#define SIZE_T_FMT  \"%%" PRIdMAX "\"\n");
 192 # else
 193 if (sizeof(test_size_t) > sizeof (test_ulong_t))
 194   fprintf(new, "#define SIZE_T_FMT  \"%%llu\"\n");
 195 else
 196   fprintf(new, "#define SIZE_T_FMT  \"%%lu\"\n");
 197 # endif
 198 #endif
 199
 200 /* Now search the makefile for certain settings */
 201
 202 base = fopen("Makefile", "rb");
 203 if (base == NULL)
 204   {
 205   printf("*** Buildconfig: failed to open Makefile\n");
 206   (void)fclose(new);
 207   exit(1);
 208   }
 209
 210 errno_quota[0] = 0;    /* no over-riding value set */
 211 ostype[0] = 0;         /* just in case */
 212 cc[0] = 0;
 213
 214 while (fgets(buffer, sizeof(buffer), base) != NULL)
 215   {
 216   int i;
 217   have_item *h;
 218   save_item *s;
 219   char *p = buffer + (int)strlen(buffer);
 220   linecount++;
 221   while (p > buffer && isspace((unsigned char)p[-1])) p--;
 222   *p = 0;
 223   p = buffer;
 224   while (isspace((unsigned char)*p)) p++;
 225
 226   /* Notice when we hit the user's makefile */
 227
 228   if (strcmp(p, "# From Local/Makefile") == 0)
 229     {
 230     in_local_makefile = 1;
 231     continue;
 232     }
 233
 234   /* Remember the last DB option setting. If we hit two in the user's
 235   Makefile, complain. */
 236
 237   for (i = 1; i < sizeof(db_opts)/sizeof(char *); i++)
 238     {
 239     int len = (int)strlen(db_opts[i]);
 240     if (strncmp(p, db_opts[i], len) == 0 && (p[len] == ' ' || p[len] == '='))
 241       {
 242       if (in_local_makefile)
 243         {
 244         if (use_which_db_in_local_makefile)
 245           {
 246           printf("*** Only one of USE_DB, USE_GDBM, or USE_TDB should be "
 247             "defined in Local/Makefile\n");
 248           exit(1);
 249           }
 250         use_which_db_in_local_makefile = 1;
 251         }
 252       use_which_db = i;
 253       break;
 254       }
 255     }
 256   if (i < sizeof(db_opts)/sizeof(char *)) continue;
 257
 258   /* Items where we just save a boolean */
 259
 260   for (h = have_list; h->name != NULL; h++)
 261     {
 262     int len = (int)strlen(h->name);
 263     if (strncmp(p, h->name, len) == 0)
 264       {
 265       p += len;
 266       while (isspace((unsigned char)*p)) p++;
 267       if (*p++ != '=')
 268         {
 269         printf("*** Buildconfig: syntax error in Makefile line %d\n", linecount);
 270         exit(1);
 271         }
 272       while (isspace((unsigned char)*p)) p++;
 273       if (strcmp(p, "YES") == 0 || strcmp(p, "yes") == 0) *(h->flag) = 1;
 274         else *(h->flag) = 0;   /* Must reset in case multiple instances */
 275       break;
 276       }
 277     }
 278
 279   if (h->name != NULL) continue;
 280
 281   /* Items where we save the complete string */
 282
 283   for (s = save_list; s->name != NULL; s++)
 284     {
 285     int len = (int)strlen(s->name);
 286     if (strncmp(p, s->name, len) == 0)
 287       {
 288       p += len;
 289       while (isspace((unsigned char)*p)) p++;
 290       if (*p++ != '=')
 291         {
 292         printf("*** Buildconfig: syntax error in Makefile line %d\n", linecount);
 293         exit(1);
 294         }
 295       while (isspace((unsigned char)*p)) p++;
 296       strcpy(s->data, p);
 297       }
 298     }
 299   }
 300
 301 fprintf(new, "#define HAVE_IPV6             %s\n",
 302   have_ipv6? "TRUE" : "FALSE");
 303
 304 fprintf(new, "#define HAVE_ICONV            %s\n",
 305   have_iconv? "TRUE" : "FALSE");
 306
 307 if (errno_quota[0] != 0)
 308   fprintf(new, "\n#define ERRNO_QUOTA           %s\n", errno_quota);
 309
 310 if (strcmp(cc, "gcc") == 0 &&
 311     (strstr(ostype, "IRIX") != NULL || strstr(ostype, "AIX") != NULL))
 312   {
 313   fprintf(new, "\n/* This switch includes the code to fix the inet_ntoa() */");
 314   fprintf(new, "\n/* bug when using gcc on an IRIX or AIX system. */");
 315   fprintf(new, "\n#define USE_INET_NTOA_FIX");
 316   }
 317
 318 fprintf(new, "\n");
 319 (void)fclose(base);
 320
 321
 322 /* Now handle the macros listed in the defaults */
 323
 324 base = fopen("../src/config.h.defaults", "rb");
 325 if (base == NULL)
 326   {
 327   printf("*** Buildconfig: failed to open ../src/config.h.defaults\n");
 328   (void)fclose(new);
 329   exit(1);
 330   }
 331
 332 while (fgets(buffer, sizeof(buffer), base) != NULL)
 333   {
 334   int i;
 335   char name[256];
 336   char *value;
 337   char *p = buffer;
 338   char *q = name;
 339
 340   while (*p == ' ' || *p == '\t') p++;
 341
 342   if (strncmp(p, "#define ", 8) != 0) continue;
 343
 344   p += 8;
 345   while (*p == ' ' || *p == '\t') p++;
 346
 347   if (*p < last_initial) fprintf(new, "\n");
 348   last_initial = *p;
 349
 350   while (*p && (isalnum((unsigned char)*p) || *p == '_')) *q++ = *p++;
 351   *q = 0;
 352
 353   /* USE_DB, USE_GDBM, and USE_TDB are special cases. We want to have only
 354   one of them set. The scan of the Makefile has saved which was the last one
 355   encountered. */
 356
 357   for (i = 1; i < sizeof(db_opts)/sizeof(char *); i++)
 358     {
 359     if (strcmp(name, db_opts[i]) == 0)
 360       {
 361       if (use_which_db == i)
 362         fprintf(new, "#define %s %.*syes\n", db_opts[i],
 363           21 - (int)strlen(db_opts[i]), "                         ");
 364       else
 365         fprintf(new, "/* %s not set */\n", name);
 366       break;
 367       }
 368     }
 369   if (i < sizeof(db_opts)/sizeof(char *)) continue;
 370
 371   /* EXIM_USER is a special case. We look in the environment for EXIM_USER or
 372   EXIM_UID (the latter for backward compatibility with Exim 3). If the value is
 373   not numeric, we look up the user, and default the GID if found. Otherwise,
 374   EXIM_GROUP or EXIM_GID must be in the environment. */
 375
 376   if (strcmp(name, "EXIM_UID") == 0)
 377     {
 378     uid_t uid = 0;
 379     gid_t gid = 0;
 380     int gid_set = 0;
 381     int uid_not_set = 0;
 382     char *username = NULL;
 383     char *groupname = NULL;
 384     char *s;
 385     char *user = getenv("EXIM_USER");
 386     char *group = getenv("EXIM_GROUP");
 387
 388     if (user == NULL) user = getenv("EXIM_UID");
 389     if (group == NULL) group = getenv("EXIM_GID");
 390
 391     if (user == NULL)
 392       {
 393       printf("\n*** EXIM_USER has not been defined in any of the Makefiles in "
 394         "the\n    \"Local\" directory. Please review your build-time "
 395         "configuration.\n\n");
 396       return 1;
 397       }
 398
 399     while (isspace((unsigned char)(*user))) user++;
 400     if (*user == 0)
 401       {
 402       printf("\n*** EXIM_USER is defined as an empty string in one of the "
 403         "files\n    in the \"Local\" directory. Please review your build-time"
 404         "\n    configuration.\n\n");
 405       return 1;
 406       }
 407
 408     for (s = user; *s != 0; s++)
 409       {
 410       if (iscntrl((unsigned char)(*s)))
 411         {
 412         printf("\n*** EXIM_USER contains the control character 0x%02X in one "
 413           "of the files\n    in the \"Local\" directory. Please review your "
 414           "build-time\n    configuration.\n\n", *s);
 415         return 1;
 416         }
 417       }
 418
 419     /* Numeric uid given */
 420
 421     if (user[strspn(user, "0123456789")] == 0)
 422       {
 423       uid = (uid_t)atoi(user);
 424       }
 425
 426     /* User name given. Normally, we look up the uid right away. However,
 427     people building binary distributions sometimes want to retain the name till
 428     runtime. This is supported if the name begins "ref:". */
 429
 430     else if (strncmp(user, "ref:", 4) == 0)
 431       {
 432       user += 4;
 433       while (isspace(*user)) user++;
 434       username = user;
 435       gid_set = 1;
 436       uid_not_set = 1;
 437       }
 438
 439     else
 440       {
 441       struct passwd *pw = getpwnam(user);
 442       if (pw == NULL)
 443         {
 444         printf("\n*** User \"%s\" (specified in one of the Makefiles) does not "
 445           "exist.\n    Please review your build-time configuration.\n\n",
 446           user);
 447         return 1;
 448         }
 449
 450       uid = pw->pw_uid;
 451       gid = pw->pw_gid;
 452       gid_set = 1;
 453       }
 454
 455     /* Use explicit group if set. */
 456
 457     if (group != NULL)
 458       {
 459       while (isspace((unsigned char)(*group))) group++;
 460       if (*group == 0)
 461         {
 462         printf("\n*** EXIM_GROUP is defined as an empty string in one of "
 463           "the files in the\n    \"Local\" directory. ");
 464         if (gid_set)
 465           {
 466           printf("If you want the Exim group to be taken from the\n    "
 467             "password data for the Exim user, just remove the EXIM_GROUP "
 468             "setting.\n    Otherwise, p");
 469           }
 470         else printf("EXIM_USER is defined numerically, so there is no"
 471           "\n    default for EXIM_GROUP and you must set it explicitly.\n    P");
 472         printf("lease review your build-time configuration.\n\n");
 473         return 1;
 474         }
 475
 476       for (s = group; *s != 0; s++)
 477         {
 478         if (iscntrl((unsigned char)(*s)))
 479           {
 480           printf("\n*** EXIM_GROUP contains the control character 0x%02X in one "
 481             "of the files\n    in the \"Local\" directory. Please review your "
 482             "build-time\n    configuration.\n\n", *s);
 483           return 1;
 484           }
 485         }
 486
 487       /* Group name given. This may be by reference or to be looked up now,
 488       as for user. */
 489
 490       if (strncmp(group, "ref:", 4) == 0)
 491         {
 492         group += 4;
 493         while (isspace(*group)) group++;
 494         groupname = group;
 495         }
 496
 497       else if (username != NULL)
 498         {
 499         groupname = group;
 500         }
 501
 502       else if (group[strspn(group, "0123456789")] == 0)
 503         {
 504         gid = (gid_t)atoi(group);
 505         }
 506
 507       else
 508         {
 509         struct group *gr = getgrnam(group);
 510         if (gr == NULL)
 511           {
 512           printf("\n*** Group \"%s\" (specified in one of the Makefiles) does "
 513             "not exist.\n   Please review your build-time configuration.\n\n",
 514             group);
 515           return 1;
 516           }
 517         gid = gr->gr_gid;
 518         }
 519       }
 520
 521     /* Else trouble unless found in passwd file with user */
 522
 523     else if (!gid_set)
 524       {
 525       printf("\n*** No group set for Exim. Please review your build-time "
 526         "configuration.\n\n");
 527       return 1;
 528       }
 529
 530     /* security sanity checks
 531     if ref: is being used, we can never be sure, but we can take reasonable
 532     steps to filter out the most obvious ones.  */
 533
 534     if ((!uid_not_set && uid == 0) ||
 535         (strcmp(username, "root") == 0) ||
 536         (strcmp(username, "toor") == 0) )
 537       {
 538       printf("\n*** Exim's internal user must not be root.\n\n");
 539       return 1;
 540       }
 541
 542     /* Output user and group names or uid/gid. When names are set, uid/gid
 543     are set to zero but will be replaced at runtime. */
 544
 545     if (username != NULL)
 546       fprintf(new, "#define EXIM_USERNAME         \"%s\"\n", username);
 547     if (groupname != NULL)
 548       fprintf(new, "#define EXIM_GROUPNAME        \"%s\"\n", groupname);
 549
 550     fprintf(new, "#define EXIM_UID              %d\n", (int)uid);
 551     fprintf(new, "#define EXIM_GID              %d\n", (int)gid);
 552     continue;
 553     }
 554
 555   /* CONFIGURE_OWNER and CONFIGURE_GROUP are special cases. We look in the
 556   environment for first. If the value is not numeric, we look up the user or
 557   group. A lot of this code is similar to that for EXIM_USER, but it's easier
 558   to keep it separate. */
 559
 560   if (strcmp(name, "CONFIGURE_OWNER") == 0 ||
 561       strcmp(name, "CONFIGURE_GROUP") == 0)
 562     {
 563     int isgroup = name[10] == 'G';
 564     uid_t uid = 0;
 565     gid_t gid = 0;
 566     char *s;
 567     char *username = NULL;
 568     char *user = getenv(name);
 569
 570     if (user == NULL) user = "";
 571     while (isspace((unsigned char)(*user))) user++;
 572     if (*user == 0)
 573       {
 574       fprintf(new, "/* %s not set */\n", name);
 575       continue;
 576       }
 577
 578     for (s = user; *s != 0; s++)
 579       {
 580       if (iscntrl((unsigned char)(*s)))
 581         {
 582         printf("\n*** %s contains the control character 0x%02X in "
 583           "one of the files\n    in the \"Local\" directory. Please review "
 584           "your build-time\n    configuration.\n\n", name, *s);
 585         return 1;
 586         }
 587       }
 588
 589     /* Numeric uid given */
 590
 591     if (user[strspn(user, "0123456789")] == 0)
 592       {
 593       if (isgroup)
 594         gid = (gid_t)atoi(user);
 595       else
 596         uid = (uid_t)atoi(user);
 597       }
 598
 599     /* Name given. Normally, we look up the uid or gid right away. However,
 600     people building binary distributions sometimes want to retain the name till
 601     runtime. This is supported if the name begins "ref:". */
 602
 603     else if (strncmp(user, "ref:", 4) == 0)
 604       {
 605       user += 4;
 606       while (isspace(*user)) user++;
 607       username = user;
 608       }
 609
 610     else if (isgroup)
 611       {
 612       struct group *gr = getgrnam(user);
 613       if (gr == NULL)
 614         {
 615         printf("\n*** Group \"%s\" (specified in one of the Makefiles) does not "
 616           "exist.\n    Please review your build-time configuration.\n\n",
 617           user);
 618         return 1;
 619         }
 620       gid = gr->gr_gid;
 621       }
 622
 623     else
 624       {
 625       struct passwd *pw = getpwnam(user);
 626       if (pw == NULL)
 627         {
 628         printf("\n*** User \"%s\" (specified in one of the Makefiles) does not "
 629           "exist.\n    Please review your build-time configuration.\n\n",
 630           user);
 631         return 1;
 632         }
 633       uid = pw->pw_uid;
 634       }
 635
 636     /* Output user and group names or uid/gid. When names are set, uid/gid
 637     are set to zero but will be replaced at runtime. */
 638
 639     if (username != NULL)
 640       {
 641       if (isgroup)
 642         fprintf(new, "#define CONFIGURE_GROUPNAME         \"%s\"\n", username);
 643       else
 644         fprintf(new, "#define CONFIGURE_OWNERNAME         \"%s\"\n", username);
 645       }
 646
 647     if (isgroup)
 648       fprintf(new, "#define CONFIGURE_GROUP              %d\n", (int)gid);
 649     else
 650       fprintf(new, "#define CONFIGURE_OWNER              %d\n", (int)uid);
 651     continue;
 652     }
 653
 654   /* FIXED_NEVER_USERS is another special case. Look up the uid values and
 655   create suitable initialization data for a vector. */
 656
 657   if (strcmp(name, "FIXED_NEVER_USERS") == 0)
 658     {
 659     char *list = getenv("FIXED_NEVER_USERS");
 660     if (list == NULL)
 661       {
 662       fprintf(new, "#define FIXED_NEVER_USERS     0\n");
 663       }
 664     else
 665       {
 666       int count = 1;
 667       int i, j;
 668       uid_t *vector;
 669       char *p = list;
 670       while (*p != 0) if (*p++ == ':') count++;
 671
 672       vector = malloc((count+1) * sizeof(uid_t));
 673       vector[0] = (uid_t)count;
 674
 675       for (i = 1, j = 0; i <= count; list++, i++)
 676         {
 677         char name[64];
 678
 679         p = list;
 680         while (*list != 0 && *list != ':') list++;
 681         strncpy(name, p, list-p);
 682         name[list-p] = 0;
 683
 684         if (name[0] == 0)
 685           {
 686           continue;
 687           }
 688         else if (name[strspn(name, "0123456789")] == 0)
 689           {
 690           vector[j++] = (uid_t)atoi(name);
 691           }
 692         else
 693           {
 694           struct passwd *pw = getpwnam(name);
 695           if (pw == NULL)
 696             {
 697             printf("\n*** User \"%s\" (specified for FIXED_NEVER_USERS in one of the Makefiles) does not "
 698               "exist.\n    Please review your build-time configuration.\n\n",
 699               name);
 700             return 1;
 701             }
 702           vector[j++] = pw->pw_uid;
 703           }
 704         }
 705       fprintf(new, "#define FIXED_NEVER_USERS     %d", j);
 706       for (i = 0; i < j; i++) fprintf(new, ", %d", (unsigned int)vector[i]);
 707       fprintf(new, "\n");
 708       }
 709     continue;
 710     }
 711
 712   /* WITH_CONTENT_SCAN is another special case: it must be set if either it or
 713   WITH_OLD_DEMIME is set. */
 714
 715   if (strcmp(name, "WITH_CONTENT_SCAN") == 0)
 716     {
 717     char *wcs = getenv("WITH_CONTENT_SCAN");
 718     char *wod = getenv("WITH_OLD_DEMIME");
 719     char *dcc = getenv("EXPERIMENTAL_DCC");
 720     if (wcs != NULL || wod != NULL || dcc != NULL)
 721       fprintf(new, "#define WITH_CONTENT_SCAN     yes\n");
 722     else fprintf(new, "/* WITH_CONTENT_SCAN not set */\n");
 723     continue;
 724     }
 725
 726   /* Otherwise, check whether a value exists in the environment. Remember if
 727   it is an AUTH setting or SUPPORT_CRYPTEQ. */
 728
 729   if ((value = getenv(name)) != NULL)
 730     {
 731     int len;
 732     len = 21 - (int)strlen(name);
 733
 734     if (strncmp(name, "AUTH_", 5) == 0) have_auth = 1;
 735     if (strncmp(name, "SUPPORT_CRYPTEQ", 15) == 0) support_crypteq = 1;
 736
 737     /* The text value of LDAP_LIB_TYPE refers to a macro that gets set. */
 738
 739     if (strcmp(name, "LDAP_LIB_TYPE") == 0)
 740       {
 741       if (strcmp(value, "NETSCAPE") == 0 ||
 742           strcmp(value, "UMICHIGAN") == 0 ||
 743           strcmp(value, "OPENLDAP1") == 0 ||
 744           strcmp(value, "OPENLDAP2") == 0 ||
 745           strcmp(value, "SOLARIS") == 0 ||
 746           strcmp(value, "SOLARIS7") == 0)              /* Compatibility */
 747         {
 748         fprintf(new, "#define LDAP_LIB_%s\n", value);
 749         }
 750       else
 751         {
 752         printf("\n*** LDAP_LIB_TYPE=%s is not a recognized LDAP library type."
 753           "\n*** Please review your build-time configuration.\n\n", value);
 754         return 1;
 755         }
 756       }
 757
 758     else if (strcmp(name, "RADIUS_LIB_TYPE") == 0)
 759       {
 760       if (strcmp(value, "RADIUSCLIENT") == 0 ||
 761           strcmp(value, "RADIUSCLIENTNEW") == 0 ||
 762           strcmp(value, "RADLIB") == 0)
 763         {
 764         fprintf(new, "#define RADIUS_LIB_%s\n", value);
 765         }
 766       else
 767         {
 768         printf("\n*** RADIUS_LIB_TYPE=%s is not a recognized RADIUS library type."
 769           "\n*** Please review your build-time configuration.\n\n", value);
 770         return 1;
 771         }
 772       }
 773
 774     /* Other macros get set to the environment value. */
 775
 776     else
 777       {
 778       fprintf(new, "#define %s ", name);
 779       while(len-- > 0) fputc(' ', new);
 780
 781       /* LOG_FILE_PATH is now messy because it can be a path containing %s or
 782       it can be "syslog" or ":syslog" or "syslog:path" or even "path:syslog". */
 783
 784       if (strcmp(name, "LOG_FILE_PATH") == 0)
 785         {
 786         char *ss = value;
 787         for(;;)
 788           {
 789           char *pp;
 790           char *sss = strchr(ss, ':');
 791           if (sss != NULL)
 792             {
 793             strncpy(buffer, ss, sss-ss);
 794             buffer[sss-ss] = 0;  /* For empty case */
 795             }
 796           else strcpy(buffer, ss);
 797           pp = buffer + (int)strlen(buffer);
 798           while (pp > buffer && isspace((unsigned char)pp[-1])) pp--;
 799           *pp = 0;
 800           if (buffer[0] != 0 && strcmp(buffer, "syslog") != 0)
 801             check_percent_ess(buffer, name);
 802           if (sss == NULL) break;
 803           ss = sss + 1;
 804           while (isspace((unsigned char)*ss)) ss++;
 805           }
 806         fprintf(new, "\"%s\"\n", value);
 807         }
 808
 809       /* Timezone values and HEADERS_CHARSET get quoted */
 810
 811       else if (strcmp(name, "TIMEZONE_DEFAULT") == 0||
 812                strcmp(name, "HEADERS_CHARSET") == 0)
 813         fprintf(new, "\"%s\"\n", value);
 814
 815       /* For others, quote any paths and don't quote anything else */
 816
 817       else
 818         {
 819         if (value[0] == '/') fprintf(new, "\"%s\"\n", value);
 820           else fprintf(new, "%s\n", value);
 821         }
 822       }
 823     }
 824
 825   /* Value not defined in the environment; use the default */
 826
 827   else
 828     {
 829     char *t = p;
 830     while (*p == ' ' || *p == '\t') p++;
 831     if (*p != '\n') fputs(buffer, new); else
 832       {
 833       *t = 0;
 834       if (strcmp(name, "BIN_DIRECTORY")   == 0 ||
 835           strcmp(name, "CONFIGURE_FILE")  == 0)
 836         {
 837         printf("\n*** %s has not been defined in any of the Makefiles in the\n"
 838           "    \"Local\" directory. "
 839           "Please review your build-time configuration.\n\n", name);
 840         return 1;
 841         }
 842
 843       if (strcmp(name, "TIMEZONE_DEFAULT") == 0)
 844         {
 845         char *tz = getenv("TZ");
 846         fprintf(new, "#define TIMEZONE_DEFAULT      ");
 847         if (tz == NULL) fprintf(new, "NULL\n"); else
 848           fprintf(new, "\"%s\"\n", tz);
 849         }
 850
 851       else fprintf(new, "/* %s not set */\n", name);
 852       }
 853     }
 854   }
 855
 856 (void)fclose(base);
 857
 858 /* If any AUTH macros were defined, ensure that SUPPORT_CRYPTEQ is also
 859 defined. */
 860
 861 if (have_auth)
 862   {
 863   if (!support_crypteq) fprintf(new, "/* Force SUPPORT_CRYPTEQ for AUTH */\n"
 864     "#define SUPPORT_CRYPTEQ\n");
 865   }
 866
 867 /* End off */
 868
 869 fprintf(new, "\n/* End of config.h */\n");
 870 (void)fclose(new);
 871 return 0;
 872 }
 873
 874 /* End of buildconfig.c */